This funnel tool is for bleeding or flushing the servo assisted (Integral) ABS brake sytsems on late model BMW bikes. It is an affordable alternative to the OE BMW tool (# 341580 - cost $213) and will allow you to bleed and/or flush the brake fluid on your late model Integral ABS system yourself. The correct BMW ABS resevior cap is used in our funnel tool so the fit is perfect and air tight.